1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Evgen [1.6K]
3 years ago
12

Copper sulfate, when it is dissolved in water, has a blue color. When steel wool is mixed with a copper sulfate solution, the st

eel wool disappears, a brownish solid forms, and the color of the solution changes from blue to green.
Choose one answer that gives the best evidence that a chemical reaction took place.

A. The color change from blue to green happens in nature.

B. The disappearance of the steel wool shows that a new substance has formed.

C. The solid precipitate is a waste product in the reaction.

D. Energy is lost in this reaction like all other reactions.


Which answer did you choose? Explain your reasoning.
Chemistry
1 answer:
jenyasd209 [6]3 years ago
4 0

Answer:

A. The color change from blue to green happens in nature.

Explanation:

The color change is an indicator of a chemical reaction that has occurred. Although color changes are not necessarily good diagnostic tool to measure if a chemical reaction has occurred or not.

  • In this reaction, color changes is quite an effective tool
  • Chemical changes usually involves the formation of a new product from the chemical reaction.
  • Also, the steps are not easily reversible.
  • For this reaction, color change is the most appropriate signal for a chemical change.
You might be interested in
I need help with #4... Chemistry is my worst subject.
ella [17]
Use slader.com it helps with all textbook work!
5 0
3 years ago
Where do you write salt and suger why​
Rashid [163]

Answer:

here: "salt and sugar"

Explanation:

I dunno, looks pretty, gives 5 points. even tough any context is missing

but seriously:

salt and sugar look the same. just someone with a split personality

7 0
3 years ago
Someone please help me:
Stels [109]

Answer: The number to the left of AC should be 6.

Explanation: The balanced chemical reaction is one in which the number of atoms  of each element on the reactant side must be equal to the number of atoms on product side.

The given equation A_2B + DC_3 \rightarrow AC + D_2B_3 is unbalanced as the atoms on the reactant side are not same as number of  atoms on product side. This equation is called as skeletal equation.

The balanced chemical equation is :

3A_2B + 2DC_3 \rightarrow 6AC + D_2B_3

Thus the number to the left of AC is 6.


6 0
3 years ago
Read 2 more answers
What is the total number of atoms contained in 80 grams of neon?
Akimi4 [234]
1. “what forms of energy conversions occur during the process of photosynthesis? (How does energy transform?)

2. What is missing from the food web but is essential to maintain equilibrium?
A. Soil
B.water
C. Decomposers
D. Oxygen
3 0
3 years ago
What is the specific heat of titanium in j/(g⋅∘c) if it takes 89.7 j to raise the temperature of a 33.0 g block by 5.20 ∘c?
larisa [96]
Specific  heat  capacity  is  the  amount  of  energy  required  to  raise one  gram  of  substances by 1 degree  celsius .  Therefore  specific  heat  capacity  for  tatanium  is  89.7j /(  33.0g  x5.2 degree celsius) = 0.52j/g  degree celcius
Molar mass for tatanium   is  47.9 g/mole
heat  is  therefore 47.9  g/mole  x 0.52j/g  =24.9j/mole
5 0
3 years ago
Read 2 more answers
Other questions:
  • Which is a chemical property of soda ash
    6·2 answers
  • What kind of bond is created by week electrical attraction between polar molecules
    5·1 answer
  • Jim takes 45 seconds to walk 180 meters north to a store what is jims meters per second
    9·2 answers
  • I have the smallest atomic number of all the
    10·1 answer
  • 13. What would you expect the pH of an aqueous solution of tertiary bromide in water to be (acidic, neutral, or basic)
    5·1 answer
  • A catalyst increases the rate of a chemical reaction by
    5·1 answer
  • Using the ruler, what is the value of A considering significant<br> figures?
    6·1 answer
  • Wine goes bad soon after opening because the ethanol (CH3CH2OH) dissolved in it reacts with oxygen (O2) gas to form water and aq
    9·1 answer
  • The process plants use to make food is called:
    13·2 answers
  • When rubbing alcohol and water are at room temperature, which one boils first
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!